Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7108c41af80b7d0e53715acbff35069ec38d20015e08dc2f0adb3d544e16bd3' 
  AND token = 'QlR55GjK5wpq7uog27p93ri5i10vsgkQfHhlKITsrdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}